The best solution found so far has been to include the holographic printing on the date like we do on the new style ADPP. It makes it very difficult to alter the date.
Permit misuse can be reported through the issuing authority. You will need the permit number, car registration and any additional information you can provide.
VIC: Contact the issuing council
TAS: Contact the department of State Growth Transport Scheme – Phone: 1300 135 513 Email: firstname.lastname@example.org
ACT: Contact the Transport Authority – http://www.rego.act.gov.au/parking/special-parking-permits/australian-disability-parking-permits